Iskra FPC 200 - Page 47

Functionality
USER MANUAL FPC 200 - 3/2017 47
2.4.3.5 Setting parameters
Parameter
Range
Description
Enabled
No
Yes
Enabling protection function.
Mode
Off
Positive
Negative
Both
Selection of different types of protection operation modes.
Pickup value
0,2 … 0,50 … 10,00


Value at which fault conditions are considered. The value is
presented in absolute positive number.
Trip delay
0,10 … 0,20 … 300,00 s
Delay of trip signal
Pickup delay
0,00 … 1000 ms
Time stabilization of fault detection. As a filter of short
disturbances on measuring circuits. Time before protection starts.
Drop-out delay
0,00 … 0,20 … 60,00 s
Time stabilization of pickup signal. Time when the monitored value
is outside the operating range, but the protection does not stop
yet.
Drop-out ratio
0,80 … 0,95 … 1,00 Pickup
Drop-out ratio below which the protection drops.
Pickup block
None
Variable 1
Variable 2
Variable 3
Variable 4
Source of blocking signal.
Table 34: ROCOF protection function parameters.
2.4.3.6 Counters
Name
Description
Pickup
Total consecutive number of pickup signals.
Trip
Consecutive number of trip signals.
Table 35: Counters presented in ROCOF protection.